I'm not saying Senchenko is that bad a fight, I just don't get the weight jumping. You say it's only 7 pounds, but Khan's been dropped by super featherweights, knocked out at lightweight and at light welter, so given the nature of his punch resistance a move upto welter just doesn't seem a clever move. I guess you could argue moving up might help his chin, but that hasn't happened so far in his career.

The reason he gets knocked over isn't his fragile chin per se, its his complete lack of defence. If he doesn't get hit then he doesn't go down, its pretty simple really, a fundamental of the game that he hasn't come to grips with yet.